This article explores how using mobile learning-focused mixed reality (MR) can complement and reinforce learning experiences outside the classroom. Our study involved one primary school class, the teacher, and a marine reserve visitor centre and was based in the co-design of digital tools which were contextually relevant to all educators and learners. Data gathered over 2 years indicated that student engagement, knowledge and attitude development, and environmental action-taking were promoted through this MR approach. Implications for classroom practice are discussed.